performance

Bookmarks for 26 set 2011 from 10:33 to 16:06

These are my links for 26 set 2011 from 10:33 to 16:06:

  • Spying Apache server activity and performance with mod_status | Debian/Ubuntu Tips & Tricks – On Debian based systems such as Ubuntu… Apache comes with mod_status compiled in by default.
    mod_status provides information on your apache server activity and performance.
    This tutorial will show you how to enable this feature in such a way that only requested issued from localhost will be accepted and served.
  • Checkpoint FAQ – UNLESS OTHERWISE NOTED, THESE ANSWERS ALL PERTAIN TO NOKIA ENFORCEMENT POINTS RUNNING IPSO 3.8.1 OR IPSO 4.1 AND CHECKPOINT R55P, AND A WINDOWS MANAGEMENT CONSOLE.
  • Free CCNA Labs – Table of Contents – If you want to earn the CCNA, you’re going to need “hands on” experience. Free CCNA Labs is your source for lab exercises and scenarios to help you prepare for the CCNA exam.

    On this page, you’ll find all of my informative articles neatly organized (the lab exercises get their own page). It’s a bit sparse at the moment, but I’ll be adding several articles and labs every week. I’m occasionally recording videos to supplement the other content and provide demonstrations.

Bookmarks for 1 giu 2011 through 2 giu 2011

These are my links for 1 giu 2011 through 2 giu 2011:

  • 500 Internal Server Error – 500 Internal Server Error
  • SED Explained! | Sarath Lakshman – Tutorial on SED scripting in PDF<br />
    <br />
    [ via zarrelli.org ]
  • Running a Reverse Proxy with Apache: – In 2003, Nick Kew released a new module that complements Apache's mod_proxy and is essential for reverse-proxying. Since then he gets regular questions and requests for help on proxying with Apache. In this article he attempts to give a comprehensive overview of the proxying and mod_proxy_html<br />
    <br />
    This article was originally published at ApacheWeek in January 2004, and moved to ApacheTutor with minor updates in October 2006. The current revision was made in October 2009 and incorporates updates in Apache 2.2 and mod_proxy_html 3.1.

Bookmarks for 3 mag 2011 through 4 mag 2011

These are my links for 3 mag 2011 through 4 mag 2011:

Bookmarks for 26 apr 2011 through 27 apr 2011

These are my links for 26 apr 2011 through 27 apr 2011:

  • Miniguida: Scrivere il profilo su LinkedIn –
  • OpenPanel – OpenPanel is a free open source control panel. It has lots of functionality, an attractive interface and is very user friendly. OpenPanel is a platform for developers. Because it is extremely open and modular it can be utilised to control any process on a Linux server.
  • Sql Performance Explained – SQL Performance Explained is a free SQL tuning e-book for developers.<br />
    It avoids unnecessary details about database internalsbut highlights the one topic that is most often neglected: proper indexing.

Bookmarks for 27 mar 2011 from 02:00 to 21:07

These are my links for 27 mar 2011 from 02:00 to 21:07:

  • rackerhacker/MySQLTuner-perl – GitHub – MySQLTuner is a script written in Perl that allows you to review a MySQL installation quickly and make adjustments to increase performance and stability.  The current configuration variables and status data is retrieved and presented in a brief format along with some basic performance suggestions.
  • Sundry MySQL Scripts and Docs – This script takes information from "SHOW STATUS LIKE…" and "SHOW VARIABLES LIKE…" to produce sane recomendations for tuning server variables. It is compatable with all versions of MySQL 3.23 and higher (including 5.1)
  • 500 Internal Server Error – 500 Internal Server Error

Bookmarks for 23 dic 2010 through 3 gen 2011

These are my links for 23 dic 2010 through 3 gen 2011:

  • How to Survive a Slashdotting on a Small Apache Server – …so your plain ordinary webserver just got listed on a high-traffic news site.  Slashdot?  Reddit?  Hacker News?  Well done, turns out you’re hosting something thousands of people want to read.  Now thousands of people want to come to your webserver at once… […]
  • WordPress, tutto sul file wp-config.php – […] La documentazione ufficiale di WordPress dedica una intera pagina al file wp-config.php. Si tratta del file di configurazione che permette al sito di collegarsi al database. Di regola è sufficiente impostare solamente i parametri per la connessione, le chiavi di sicurezza, il prefisso per le tabelle nel caso di installazioni multiple sullo stesso database, e della localizzazione nella propria lingua, ma è possibile anche impostare altri parametri per personalizzare ulteriormente la propria installazione di WordPress. Vediamo come […] 
  • 500 Internal Server Error – 500 Internal Server Error

Bookmarks for 5 ott 2010 through 6 ott 2010

These are my links for 5 ott 2010 through 6 ott 2010:

  • DNS e Postfix: come non generare "spam" | Kreations Collective – […]Ho recentemente configurato alcuni server per l’invio di email. Parte del lavoro ha riguardato la corretta configurazione di Postfix e del server DNS per evitare che le email inviate venissero rilevate come spam.[…]<br />
    La configurazione ha riguardato tre punti principali:<br />
    Impostazione del record A e del reverse address<br />
    Impostazione di SPF<br />
    Configurazione di DKIM e DomainKeys<br />
    […]
  • How to build your own CDN using BIND, GeoIP, Nginx, Varnish | UNIXy – In this article, we shall outline the steps required to build a private Content Delivery or Distribution Network (CDN) using a VPS with Varnish Cache and Nginx. The goal is to build a CDN using free, readily available software but most importantly spend the least amount of funds possible. To this end, all nodes participating in this network are going to be virtual machines (Xen, Virtuozzo, OpenVZ, etc). Should you have any questions or comments on the configuration of this CDN, please post them in this forum: http://www.varnish-cache.info/
  • Comandi testuali per i sistemi Windows – […] Al lavoro, spesso mi capita di dover eseguire le stesse operazioni su più server, più volte alla settimana. La maggior parte di queste operazioni riguardano utilità di sistema di Windows, come la gestione utenti di Active Directory, o quella del DNS od altro ancora. Certo, un collegamento sul desktop è comodo, ma in talune situazioni può tornare decisamente comodo (e più veloce) conoscere il nome degli eseguibili relativi ad un determinato pannello MMC, piuttosto che l’apposita applicazione contenuta nel Pannello di Controllo.<br />
    <br />
    Quello che segue è un elenco della maggior parte di questi comandi, tutti lanciabili direttamente dal pannello “Esegui” situato nello Start Menu di Windows. Alcuni di questi comandi possono essere distruttivi, portando addirittura alla formattazione del disco ed alla conseguente perdita di dati, per cui usateli solo se ritenete di essere in grado di farlo […]

Bookmarks for 22 giu 2010 through 23 giu 2010

These are my links for 22 giu 2010 through 23 giu 2010:

  • Diagnosing Bottlenecks with Performance Toolbox – This document describes how to check for resource bottlenecks using the Performance Toolbox for AIX. Resources on a system include memory, cpu, and Input/Output (I/O). This document covers bottlenecks across an entire system and is applicable to Performance Toolbox versions 2.1 and 2.2. This document does not address how to find the bottlenecks of a particular application. The following commands are described:
  • vTask Studio – Support – Here are some productivity-enhancing programs for our customers at no cost:<br />
    * Our most popular freeware, TinyTask provides quick & easy automation by recording / playback.<br />
    * Increase your efficiency by automating your keyboard with TyperTask! This tool simulates keyboard typing, and can be used to instantly type common phrases.<br />
    * TimerTask will perform a job at a specified time. <br />
    * QwikMark provides fast and easy benchmarking. <br />
    * WhatChanged is a system utility that scans for modified files and registry entries.<br />
    * DataTool has been around in one form or another since the mid 1990's (pre-Toad).<br />
    * Associate is a command-line utility for assigning file associations. <br />
    <br />
    [ via http://www.masayume.it/drupal/content/piccoli-attrezzi-digitali-vtask-studio ]
  • Convert Squid unixtime logs in human-readable ones | commandlinefu.com – On-the-fly conversion of Unix Time to human-readable in Squid's access.log

Bookmarks for 7 mag 2010 through 12 mag 2010

These are my links for 7 mag 2010 through 12 mag 2010:

  • AIX « I am vistababa! –
  • How to get unrestricted root access to HMC? « I am vistababa! – Using GUI interface of HMC, you can’t do everything you like! You just can use predefined features of GUI. For example, you can’t schedule every commands you want, or you can’t run a command remotely on clients from HMC, and so on.
  • Get your Dell Service Tag number via the Linux (or Windows) command-line – Brandon Checketts – When your server is located in a data center far away, it makes it difficult to walk over to the box and read the service tag off of it. Fortunately, the Service Tag is stored somewhere in the system BIOS, and is accessible with the ‘dmidecode’ utility.
  • TCP Traffic Analyzer (Yahoo! Developer Network Blog) – You probably have questions like these about traffic on a TCP (Transmission Control Protocol) server (or client):<br />
    <br />
    * How many connections lasted more (or less) than X milliseconds?<br />
    * How many connections needed more than N attempts to succeed?<br />
    * What is the distribution of connection duration or connection throughput?<br />
    * What is the distribution of connection duration or throughput for connections in which the server or client sent more than N bytes?<br />
    * What specific IP addresses and ports had connections that lasted between 50 and 100 milliseconds long?<br />
    <br />
    You can get answers to these questions (and more) using Yahoo!'s TCP Traffic Analyzer (yconalyzer), available as an open-source project via free download.

Bookmarks for 22 feb 2010 through 1 mar 2010

These are my links for 22 feb 2010 through 1 mar 2010:

  • 10 Useful Google Spreadsheet Formulas You Must Know – woorkup.com – Google Spreadsheet is a powerful and free tool to manage complex spreadsheets. This tutorial illustrates ten useful formulas you must know to help you simplify the way you work in Google Spreadsheet.
  • La focaccina aromatizzata : A totanus in the net – Uno dei passaggi obbligati della carriera di “panettiere in casa” è quello di provare a fare il panino aromatizzato. Le ricette in proposito sono migliaia e quindi non vale la pena star qui a spiegare dosi e quantità.

    Mi faceva invece piacere condividere una metodologia.

  • Apache2 / Worker / Fcgid / PHP5 on Debian Linux – Quando il tuo web server non riescie piu’ a gestire le numerose richieste che gli arrivano da tutto il mondo, e’ ora di pensare di cambiare gestione di Apache2 per qualcosa che richieda meno risorse e risulti piu’ performante

    La soluzione di usare Apache in modalita’ “worker” (multi-threaded) invece di quella tradizionale “prefork” e’ il compromesso giusto per ottenere un ottimo web server.

    il problema con il modulo “worker” e’ che quest’ultimo non supporta il modulo nativo per Apache di PHP, per questo bisogna usare php5-cgi e fastcgi (fcgid)[…]